As per National Highways Authority of India, which is the smallest national highway in Jharkhand?

NH 133B
NH 33
NH 20
NH 143H

The correct answer is: A. NH 133B

NH 133B is a national highway in India. It is a spur road of National Highway 33. It starts at Ranchi and ends at Daltonganj. It is 122.2 km long.

NH 33 is a national highway in India. It runs from Varanasi in Uttar Pradesh to Silchar in Assam. It is 1,408 km long.

NH 20 is a national highway in India. It runs from Agra in Uttar Pradesh to Kanyakumari in Tamil Nadu. It is 2,465 km long.

NH 143H is a national highway in India. It runs from Ranchi in Jharkhand to Jamshedpur in Jharkhand. It is 189 km long.

Therefore, NH 133B is the smallest national highway in Jharkhand.